I tunes music and my book live

"multiple options. Here is one.

1.- Mount music share folder on computer

2.- Add drive/folder to the Itunes library."

Sorry I am knowledgeless. If I add drive/folder to the itunes library will my music show up on my devices as well? (Ipad/iphone) I have the my cloud app on my devices, but it is very hard to find anything with the WD app.